Waited 'til 3pm before trading this afternoon, but it was still far more trouble than it's worth - down over 100 on the first 4 yen trades so got really jumpy trying to make it back. The 2 yen crosses were hovering around the signal zone for what seemed like ages until they finally crawled upwards, so that's obviously the sensitive zone for this current incarnation of the system. Either need bigger stops or a slightly earlier entry... or just need to accept it's not worth bothering with in the afternoon.